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A filter selectively processes input signals in frequency- or time-domain.

3 votes
3 answers
401 views

Design help! -- Play a pure tone into a mic and depending on its frequency a specific LED wi...

I would much rather have the filter do the cutting off rather than having to use comparators, but won't I need a very high Q filter so that for frequencies immediately past the cutoff range the LED is … My proposed flowchart of the circuit is mic->band pass filter->amplifier ->rectifier->low pass filter->comparator(maybe)->LED Regardless of whether I use comparators or not, I will need to know the input …
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